1. You cannot be spotted, if the annoying “Reward” meter is displayed it means you failed
2. You can use only the phantom blade and the firearm
3. So smoke bombs, berserk blades, etc. are not allowed
4. You have to kill as many enemies as possible, even those who don’t block your path to the chest
5. If possible, avoid killing enemies by using the “last known position”
6. You have to clear the path and have no-enemy access to at least two chests
7. You cannot use the disguise skill
8. You cannot use the assassin’s cache skill to refill your inventory but you can use the shop located in the area